Once you start to dive deeper into what it takes to keep gluten out of your daily food intake, you'll soon start to see hidden sources of gluten in places that may surprise you.

Making a lot of your own food gives you control over keeping hidden gluten off your plate. Luckily, since celiac disease and issues of gluten intolerance have become more mainstream, there are many commercially available gluten-free alternatives to products you might rely on in your pantry.

Here are eight foods you probably had no idea contained gluten — and what you can eat instead.

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Oats

It's true that oats by themselves do not contain gluten. However, the key is "by themselves." Commercial farms frequently grow oats and other crops together— including wheat, barley, rye, and other grains. That means cross-contamination can occur pretty much whenever the wind blows — as well as along the production line after harvest.

What to eat instead:

Oats specifically marked as "gluten-free" are grown, harvested, and processed in dedicated gluten-free facilities for anyone who has gluten sensitivities. For those with extreme sensitivities, the website Gluten Free Watchdog maintains a list of companies that voluntarily adhere to a gluten-free purity protocol with their oats.

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Blue cheese and blue cheese dressing

According to registered dietitian Tricia Thompson, blue cheese is often suspect because it's a category of cheeses made using penicillium spores that may or may not have been grown on a medium — such as rye bread — that contains gluten. It's difficult to get clear answers, so the matter is one of eternal debate.

What to eat instead:

Pringles

You can read sad tales of former Pringles-lovers who discovered that they couldn't eat their favorite chip anymore all over the Internet. It's true: Pringles contain wheat ingredients.

What to eat instead:

Several companies have lists of chips available in the US that are gluten-free. So rest assured, you're definitely not our of chip options. Here are a few to get you started, but be sure to check the manufacturer's website of your favorite snack brand if it's not listed here:

Cornbread

Read over many popular cornbread recipes and you'll see two things. They all contain cornmeal, and they all contain some variety of wheat flour. The same is true of restaurant cornbread, as well.

Unless something specifically says that it is gluten-free, do not mistakenly believe that it contains no wheat products.

What to eat instead:

I would never suggest you completely give up cornbread — I'm not a monster. If you love cornbread and you're interested in making it yourself, I make this recipe all the time. Some baking mix companies also offer GF cornbread mixes if you just want recipe training wheels.

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Candy

Lots of candy bars and other sweet treats that you may love contain gluten. Twizzlers, Almond Joy, and Milky Way are all examples. Always read the labels carefully if you're trying to avoid this or any other allergen.